Late Tuesday, Apple officially released iPhone OS 3.0 beta to to its developer community. According to Engadget, the new beta includes push notifications and in-app purchasing, giving developers a chance to play with these features. The report also cites significant stability improvements within the new build.
While MMS and tethering are also included within beta 2, Apple has apparently asked developers not to try these features as of yet.
Per the Apple Core, Apple has also made the following changes in beta 2:

B2 killed a lot of the typing lag, and scrolling problems.

Some speed improvements.

Some stereo bluetooth controls are working (play and pause). Others (rewind and fast forward) are not.

There’s a new Store option under Settings, but it’s empty.

New icon in the left side of the menu bar to indicate when call forwarding has been enabled.

Despite Apple’s warning against MMS and tethering, they can be enabled by modifying the ipcc file (the carrier settings). They both work in b2 in the U.S. although some countries have trouble getting them to work at the same time, but they work, regardless of the firmware.

The exchange email bug that prevented you from syncing to your corporate email was fixed.

New way to open a new page in Safari: Tap and hold on a link and a menu pops up allowing you to open, open in new page or copy the link (or cancel).

The iPhone OS beta 2 build can be downloaded from here upon signing up for an ADC account.
If you’ve tried the new build, please let us know what you think of it in the comments or forums.

Late Tuesday, Apple officially released iPhone OS 3.0 beta to to its developer community. According to Engadget, the new beta includes push notifications and in-app purchasing, giving developers a chance to play with these features. The report also cites significant stability improvements within the new build.
While MMS and tethering are also included within beta 2, Apple has apparently asked developers not to try these features as of yet.
Per the Apple Core, Apple has also made the following changes in beta 2:

B2 killed a lot of the typing lag, and scrolling problems.

Some speed improvements.

Some stereo bluetooth controls are working (play and pause). Others (rewind and fast forward) are not.

There’s a new Store option under Settings, but it’s empty.

New icon in the left side of the menu bar to indicate when call forwarding has been enabled.

Despite Apple’s warning against MMS and tethering, they can be enabled by modifying the ipcc file (the carrier settings). They both work in b2 in the U.S. although some countries have trouble getting them to work at the same time, but they work, regardless of the firmware.

The exchange email bug that prevented you from syncing to your corporate email was fixed.

New way to open a new page in Safari: Tap and hold on a link and a menu pops up allowing you to open, open in new page or copy the link (or cancel).

The iPhone OS beta 2 build can be downloaded from here upon signing up for an ADC account.
If you’ve tried the new build, please let us know what you think of it in the comments or forums.